End structure for poweder cans



June 8, 1948. R, NYDEN L 2,442,959

END STRUCTURE FOR POWDER CANS Filed July 6, 1945 III/l 'INVENTORS,B05527 HYDE/Y HAEEY h. a/czfie/wwv Patented lune 8, 1948' res ENDSTRUCTURE FOR POWDER CANS Delaware Application July 6, 1945, Serial No.603,415

6 Claims.

1 This invention relates to improvements in containers and especially tocontainers for powder or other comminuted materials, and principallyconstructed of paper, fiberboard, cardboard, pasteboard, plastic, andsimilar relatively light and inexpensive materials, and having endclosure structures of metal or similar relatively hard and rigidmaterial.

It is a general object of the invention to provide for containers of theclass mentioned, an improved end closure structure especiallyconstructed and arranged for making tight anti-sift joints with the bodypart of the container, and is firmly held in position to avoidaccidental separation from the body part, or to become loose or leakyduring handling thereof as in transportation, and additionally providingan improved end structure that can be quickly and easily inserted inoperative closing position without the use of special tools orapparatus.

Another object is to provide for containers of the class mentioned, animproved end closure structure of sheet metal or like material andhaving a depending or skirt flange fitting into the end of the paperbody of the container, and having an improved arrangement of a hookflange or bead inclined so as to engage and be embedded or bite into theadjacent surface of the container body so as to hold the parts firmlyand positively in assembled relation, to avoid sifting of the containercontents, and to avoid accidental separation or loosening of the partsduring handling of the container, as in transit.

According to another feature of improvement of the invention, theretaining hook flange of the end structure of the container isespecially constructed and arranged so as to impart to it additionalflexibility to enable it to engage firmly in holding relation with thecontainer wall, and to constantly maintain its holding engagement so asto avoid accidental loosening whereby a secure attachment is providedover long periods of time and during continued handling of thecontainers, as for example, when packed in cartons during shipment.

Another object of the invention is to provide for containers of theclass mentioned, an improved metallic end structure that is adapted foruse either at the top or bottom of a powder can or the like.

Still another object of the invention is to provide for containers ofthe class mentioned, an improved end structure having an arrangement ofdepending or skirt flanges for engaging both the inner and outersurfaces of the tubular container walls, and having improved attachingmeans whereby the end structure can be applied and attached in operativeposition without the use of special crimping tools or apparatus.

Other objects and advantages of the invention will be in part pointedout in the following detailed disclosure of certain illustrative butpreferred embodiments of the invention, and will be in part obviousas'the disclosure proceeds.

The invention accordingly comprises the features of construction,combination of elements, and arrangement of parts, which will beexemplified in the construction hereinafter set forth and the scope ofthe application of which will be indicated in the claims.

For a more comprehensive disclosure of the nature, objects andadvantages of the invention, reference is had to the following detaileddescription of the illustrative embodiments, and to the accompanyingdrawings in which:

Fig. 1 is a side elevation of a tubular powder can embodying theinvention;

Fig. 2 is a top plan view of the same;

Fig. 3 is an enlarged central vertical section of the powder can shownin Figs. 1 and 2;

Fig. 4 is a fragmentary bottom plan of the central portion of the endclosure structure shown in Fig. 3;

Fig. 5 is a fragmentary enlarged sectional view similar to that of Fig.3. :but disclosing a modified structure;

Fig; 6 is a fragmentary sectional view similar to Figs. 3 and 5 butshowing a further modified embodiment, and

Fig. 7 is a sectional view similar to that of Fig. 3 disclosing a stillfurther modified embodiment.

Referring to the drawing for a detailed description of the illustrativeembodiments there shown, and first to the embodiment of Figs. 1, 2, 3and 4, a can or container is shown having a body or body part iordinarily tubular in form, as shown, and constructed of paper,cardboard, fiberboard, plastic, or like relatively light material, andhaving a bottom end closure 2 and a top end closure 3. The body part Imay assume other cross-sectional shapes such, for example, as square,triangular, rectangular, polygonal, etc., and the top end closure 3 mayembody a dispensing or sifter closure structure which is describedbelow.

As best shown in detail in Fig. 3, the top end closure 3 embodies a discor plate 4 preferably constructed of metal or similar material, tinnedor otherwise coated to prevent rust, corrosion, etc., and constructed soas to be engaged in telescoping relation with the upper end of the bodypart I and having attaching means to hold it securely in assembledrelation and to provide a tight siftproof seal with the body of thecontainer. In cases where the top is constructed for dispensing orsifting the container contents, the closure plate may be provided withone or more dispensing openings "5 and with an outer'ca'p for finishingmember 6 preferably'of ornamental plastic material or of enameled metalor the like and provided with dispensing openings 1 adapted to alignwith the openings 5 or to be moved out ot alignment with the same intight sealing position upon movement of the cap 6. v p a a The closureplate 4 as shownpis preferably folded or doubled upon itself atthemarginal port on thereof to form a marginal reinforcing flange 8 whichmay be positionedinpverlapping relation with the upper end of the wall,l as shown in Fig. 3, or as shown in Fig. 7 this reinforcing flange mayterminate flush with the inner surface of the container-wall.The'metallic plate at the inner extremity of thedoubled flange 8 is bentor deflected 'downwardl'y to form the depending skirt flange-=9positioned and proportioned to engage closely with theinner surface ofthe wall-l. This skirt flang'e is formed with a retaining hook flangeQrbead l ordinarily positioned adjacent its 'lower marginal portion, asshown, and having an outeredge H which may be formed bythe severingofthe' met'al so as to impart to it-a sharpness en'ablingitto beembedded or to penetrate" intothe inner surface of thewall I.Inthepreferred-embodiment this hook flange is best providedbyfdefiecting or bending the skirt flange inwardly to form a flange part12 bent inwardly from alignment with the skirt flange 8 substantiallyalo'ng the horizontal line I3, and extending. continuously entirelyaround the skirt flange attheupper openingof the container body I. Thisflangepart I2 is bent or deflected outwardly as at 1 4 -to' form thehook'lflange it! which in this embodiment i close' to and preferablyspaced slightly'szfrom thesflangepart l2. The. hookflangeas shown :is:.thus-inclined outwardly toward .the. closure.platei ltandtoward theadjacent inner;surfacezofztheiwallcof: the body part I..Thisuhookpflange,structure) imparts an added flexibility to theattaching structureenabling the latter.toumaintain-its'attachingposition substantially constantly. overlong periodsof time as, forexample, during handling whenza :plurality of the containers-1 am,packed in..a carton during shipment .so as: -1to..'tend. too-loosen.the.attachment slightly, perhaps due to. slight.expansion of. thecontainerrwalls, or ,to other. causes. This flexible structure ismorefullydescribed-below.

In the illustrative'embodiment of Figs. 1, 2 and 3, the plastic capandidispensing controlling memher 6 is rotatably secure d..-totheclosure plate or disc 4 by means of an integraliextension. lextending through a central openingin the closure plate. Theattaching-extension [5 maybe secured in positionby any; appropriate.means .in so far as the present invention .is concerned, and as shown,a hard steel .dishedattachingwasher I6 is used for this purpose having,pointed tongues l6 adapted to-engage and to beembedded inthe attachingextension-land having-pits rim engaging with the inner surface'of theclosureplate 14. 2A sealing washer 11;. is interposed between .theoutersurface of the closuregplatedi and the inner surface of the cap. 6which-is provided with a'recess for receiving; the washeriso ,as. -tofmake a;.tight sealing joint: for the :dispensingopenings when 751 notedthat the wall of the body-I is resilient, tend- I the cap is turned tonon-dispensing position. The sealing washer may be constructed ofyielding material such, for example, as fiberboard, paperboard, and thelike, and is provided with openings adapted to align with the dispensingopenings in the closure plate 4 and in the cap 6.

In some instances, as particularly shown in Fig. 2, it is desirable toprovide a depending or skirt flange 18 at the outer edge or periphery ofthe cap 6.- This outside skirt flange l8 extends downwardlysuiflcientlyso as to engage with the outer surface of the container wall and tobrace and rigidity the wall against undue outward deflection;-thusaiding -in maintaining such a firm connection-of the-hookfflauge IDwith the container Wall as to maintain a tight permanent connection. Asshown-in Fig. 3, the bottom 2 of the container maybe constructed ofmetal similar to that of the closure plate 4, and having otherstructural features similar to the closure plate 4 for attaching thebottomin position-at. the lowerendpf the wall of the body part I.':'.The';-bottom closure member 2 maybe provided withxthedouble fol-d 8'similar to the fold-8-of the "top plate tor. it'may beconstructedsimilar to the disclosure *ofFig. 7. This bottomjplate zealsonhasa;skirt flange similar to the'flange Q'ofL-the top closure-plate, andsized and proportioned to telescopewith the lower end of. the containerwalls in a similar manner. .iThis skirt flange |9.also is providedwith-an outwardly turnedxhook iflange or bead 20 :adapted to engageor beembeddedin the :inner'surface of the-container r walls. .In .theembodiment: shown inFig. 3, the inner surfaceof the-wallof the-bodypart. I hasargroove 2|. extending;entirely'around said-.zinner surfacefor' rrecei'viing the hook: flange 20, but ordinarily thisgroove'maybeomittedso that the edge: of the 'hoo'kwflangeis:embeddedein thecontainer wall as disclosed in the. embodiment of Fig. '7. Also, itwill-beunderstood'that the bottom a plate may.be-constructedesubstantially similarto the top closureiplate lwwith thedispensing .c ap -and associated :dispensing parts omitted.

From the foregoing. detailed description: it-will beseenthat. theclosure memberor. capis well adapted for insertion-in; closingspositioninthe opening at the end of theaoontainer' which may serve-asa fillingopening. .This closure plate'is Well adapted for insertion. intoclosingposition in thebody of theacontainer without the .use .of specialcrimpingtools-or other specialapparatus. When the closure plateisinserted. from..above into itsfinal position..as.-shown. in Fig..3,, thehooks flange V 3,. .due .in. large -part. to itsspecial flexibleconstruction. .as described, will? be ..autoerratically-deflectedinwardly. slightly by engage.-

' merit-thereof with the container wall-andwhenit reaches its f finalposition :will I be icaused'b (its resiliency andpositioningto.be-embedded slightly into the inner surface of .the containerwalls;thus providing. not .only atight ,innenanti-shift joint or seal but.also providing alfirmbonnection. capable of maintaining its. holding,qualities .over long periods of time and during rough handling of thecontainenas .intransit. 1 lThe outene'dge I I of the hook. flange I listnormally positioned so that that. its diameter. .issomewhat. greater.than the inner diameter. ofthe container body,.whereby the flexibleattaching flange is swung inwardly through considerable .amplitude,-and-in its :final positionis urged outwardlyadue. toresiliencynof themetaL-tocause-the edge I I: tobite in holding relation; into the.container wall. .-Also it willbe g ing' to assume its original positionafter having been deflected outwardly Slightly during insertion of theclosure plate d. Due to the flexible struc-. ture described, theconnection thus tends to become stronger and the edge I i of the hookflange becomes more firmly embedded in the container wall duringhandling and use of the container. This improved structure thus iselfective in avoiding looseness of the closure member during handlingwith resultant objectionable shifting, and in avoiding accidentalseparation from the container in transit.

In the embodiment of the invention shown in Fig. 5, the structure andarrangement are similar to the above detailed disclosure of Figs. 1 to 4inclusive, and correspondin parts are designated 'by the same referencenumerals with the addition of the index a. In this embodiment theclosure plate 4a has a skirt flange 9a provided with a flexible hookflange structure Ida substantially the same as in Fig. 3. Also, theplastic dispensing cap ea may be substantially the same with the outerskirt flange l8 omitted.

In the embodiment of Fig. 5 an outer skirt flange 22 is formed on theclosure plate do by doubling or bending the marginal portion of theplate so as to provide this flange which extends outwardly over theupper edge of the container wall and downwardly along the outer surfaceof the latter so as to function substantially in the same manner as theskirt flange I8 above described.

The embodiment shown in Fig. 6 is similar to that of Fig. 3 andcorresponding parts are designated by the same reference numerals withthe addition of the index b. In this embodiment the inner dependingflange 91) has a part inwardly bent or deflected to form a flange partl2b corresponding generally to the structure shown in Fig. 3 andextending entirely around the top opening of the container as abovedescribed. However, in this embodiment the flange 9b is bent downwardlyso as to provide a flange part 23 substantially parallel to the flange92) and spaced inwardly from the surface of the container wall, and ofconsiderably greater extent than that of the bend M as shown in Fig. 3.The attaching or hook flange Idb is bent inwardly along the lower edgeof the flange part .23. For some purposes this construction provides agreater flexibility than that of Figs. 3 and 5.

In the embodiment of Fig. 7 the structure and arrangement aresubstantially the same as in Figs. 1 to 4 inclusive, and correspondingparts are designated by the same reference numerals with the addition ofthe index 0. In this embodiment the top closure plate do is providedwith an upper or marginal flange 8c similar to the flange 8 in Fig. 3but of an outside diameter to fit closely within the inner surface ofthe walls of the container part 10. The double reinforcing flange or rib80 may be either partially open as shown in Fig. '7, or it may have itstwo parts substantially in close or contacting relation as shown at 8 inFig. 3. The hook flange N30 is similar to that of the hook flange 23 forthe bottom closure plate 2 shown in Fig. 3 with the exception that theinner receiving groove 2: is omitted, and the outer edge of the hookflange bites into the inner surface of the container wall in a mannersimilar to that disclosed in connection with the other embodiments.

Since certain changes may be made in the above construction anddifferent embodiments of the invention could be made without departingfrom the scope thereof, it is intended that all matter contained in theabove description or shown in the accompanying drawing shall beinterpreted as illustrative and not in a limitin sense.

The invention having thus been fully described, the following isclaimed:

1. In a container, in combination, a container body having an enclosingwall and an opening, a closure member for said opening having a skirtflange extending entirely therearound and positioned for telescopingwithin said wall in close surface contact therewith, and a. hook flangepositioned at the edge portion of said skirt flange and longitudinallycoextensive therewith and having an edge portion inclined outwardlytoward said closure member and inclined to said wall and extending intothe surface of said wall to form an inner anti-sift seal coextensivewith said skirt flange and to retain the closure member in closing andsealing position.

2. In a container, in combination, a container body having an enclosingwall and an opening, a closure member for said opening having a skirtflange extending entirely therearound and positioned for telescopingwithin said wall in close surface contact therewith, a hook flangepositioned at the edge portion of said skirt flange and longitudinallycoextensive therewith and having an edge portion inclined outwardlytoward said closure member and inclined to said wall and extending intothe surface of said wall to form an inner anti-sift seal coextensivewith said skirt flange and to retain the closure member in closingposition, and said closure member being doubled upon itself adjacent tosaid skirt flange and bent to form an additional skirt flange engagingsaid wall at the opposite side thereof from the first mentioned skirtflange.

3. In a container, in combination, a container body having an enclosingwall and an opening, a closure member for said opening having a skirtflange extendin entirely therearound and positioned for telescopingwithin said wall in close surface contact therewith, and a hook flangepositioned on said skirt flange and longitudinally coextensive therewithand having an edge portion inclined outwardly toward said closure memberand inclined to said wall and extending into the surface of said wall toform an inner antisift seal coextensive with said skirt flange and toretain the closure member in closing position, the lower or innermarginal portion of said skirt flange being deflected inwardly away fromthe outer part thereof which contacts with said wall and away from saidwall and then reversely bent or deflected outwardly to form said hookflange and to impart increased flexibility thereto.

4. In a container, in combination, a container body having an enclosingwall and an opening, a closure member for said opening having a skirtflange extending entirely therearound and positioned for telescopingwithin said wall in close surface contact therewith, a hook flangepositioned on said skirt flange and longitudinally coextensive therewithand having an edge portion biting into the surface of said wall to forman inner anti-sift seal coextensive with said skirt flange and to retainthe closure member in closing position, the lower or inner marginalportion of said skirt flange being deflected away from said wall andthen reversely bent or deflected to form said hook flange and to impartincreased flexibility thereto, and said closure member being doubledupon itself adjacent to said skirt flange l l and bent to form anadditional skirt flange-e115 gagin saia wan the opposite side therebffrom the first ineiitiondskii'tflange? 5: In 'a contain'eiiii-Qzofirb'i-fiaioii, a, container body having an enclosing wall and anopeningg -z a closure member for-"said opening having eisliirt flangeextending entirely thfdib'llnfalnd pbjsi tioned for telescbpiiig-Withihs'aid' wzill in close surface contact therewith? 'a" hook flaiige' posiitioned on 1 said skirt 1 flange and longitudinally coextensive therewithand having anf edge p'or'- tion biting into th sl'irface (if-Said Wall"Eb-"form an inner anti-sift seal coextensive with's'aid skirt-L flangeandto retain-theblsui'e-member iriclbsing p0siti0n,-'thelower iir-innrinli'rgi'na l portion' of said: skirt flange being liefi'ecteii awwfrom" said "wall intbposition inclined aWay ffrbn1th'e-- Wall to form'an inclindflange pait' "extn'ding entirely around the said containeropening; "and said skirt flange being -reverse1y bent of 'defiecteii toform said hook flang -wherebyiiicreasa fiex ibilityds impartedtbsaidhobkfian'gea I GQ Ina oontaih'eig in' bombi iiationfia container body"Having "an e'nclosingwan and an" opening; a c1osui'e'member for saidopening "l'itvi'rigfisku t fi fiang'e --'exten-diiig' entirely'the'rearbimd' and --pos'i tionecl for telescoping within" said wall incl ose surface eontadt there'withj'a home flange po' tinned on saidskirt flange and *bitingiiito t e surface of' said wall o form an inne'ifiantiysi ft-so 1 ROBERT NYDENg" 7 34 m? nnmnencns or gin: 1'

The following referenees' 'a renpf 'rc ecoli l, iz tlief Number: NameDate"

